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General| Supply voltage | 24 V DC |
|---|---|
| Analog inputs | 2 |
| Mounting type | DIN rail |
| Trip Unit Type | Not applicable |
| Interrupting Rating | Not applicable |
| Mounting | DIN rail |
Details the ordering information for the Fume Hood Controller - Electronic Output (940).
Details the analog and digital inputs and outputs for the Fume Hood Controller.
Explains the controller's LEDs and the Operator Display Panel (ODP) functions.
Describes the Laboratory Exhaust Air Terminal, Venturi Air Valves, DP Transmitter, and Airflow Sensor.
Covers Electronic and Pneumatic Actuation methods, including the AO-P Module.
Describes Application 940 for controlling two-position fume hoods in a manifolded exhaust system.
Explains how the controller operates at two setpoints: HI flow and LOW flow, including OFF mode.
Describes the PID loop control for exhaust flow and signal modulation for electronic/pneumatic outputs.
Details how the controller indicates performance problems at WARNING and ALARM levels.
Describes the Emergency Purge sequence, its initiation, cancellation, and indicators.
Describes failure modes for the controller and its accessories, and how the system behaves upon failure.
Describes points for controller application identification and alarm status (LOW, HIGH, EMER ALM).
Details points for airflow setpoints (FLOW STPT) and calculated exhaust flow (EXH FLOW).
Describes analog inputs (AI1 DP TRANS) and ODP display control points.
Provides essential safety information for installing or replacing the controller, including power removal.
Recommends maintenance discussions and explains data storage for safety.
Details how to verify controller operation using the Basic Sanity Test (BST) LED and other indicators.
Defines essential terms like AI, DDC, DI, DO, FLN, PID, and Equipment Controller.
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